Re: 2D anisotropic unstructured mesh and non-classical FV schemes

2017-10-18 Thread F Hssn
>> If you wish to use an unstructured Delaunay mesh, it has >> to be isotropic (equilateral triangles) or near-isotropic otherwise >> the control volume calculation will result in overlaps and the >> conservation property will be violated (the solution would more likely >> be incorrect). > > CC-FVM

Re: 2D anisotropic unstructured mesh and non-classical FV schemes

2017-10-18 Thread Guyer, Jonathan E. Dr. (Fed)
Daniel is much better versed in the nuances of FV schemes than I am, but I did want to question one assertion you made: > On Oct 16, 2017, at 6:16 PM, F Hssn wrote: > > If you wish to use an unstructured Delaunay mesh, it has > to be isotropic (equilateral triangles) or near-isotropic otherwis

Re: 2D anisotropic unstructured mesh and non-classical FV schemes

2017-10-17 Thread F Hssn
> What is an anisotropic mesh? By anisotropic, I mean the mesh having low-quality triangles (skinny triangles, as opposed to equilateral triangles), strategically oriented so they reduce the number of vertices required but do not negatively affect the resolution of the functions or solutions invol

Re: 2D anisotropic unstructured mesh and non-classical FV schemes

2017-10-17 Thread Daniel Wheeler
Thanks for your interest in FiPy On Mon, Oct 16, 2017 at 6:16 PM, F Hssn wrote: > > So my questions are: > > - Does fipy handle anisotropic unstructured meshes without any > problem? (I'm specifically looking to use bamg for 2D mesh adaptation > based on interpolation error reduction/equidistribu

2D anisotropic unstructured mesh and non-classical FV schemes

2017-10-16 Thread F Hssn
I'm looking into using fipy to solve my system of 3 equations (one Poisson, two continuity), used for semiconductor device simulation (the drift-diffusion system, also known as van Roosbroeck system of equations). My system is: - singularly perturbed (contains sharp boundary/interface layers) -